Mohamed Saleh, Sayed Abdel-Khalek And Nesreen El-Mekawy .,

ABSTRACT
BACKGROUND: Several Patients Notice The Value Of Completely Edentulous Mandibular Ridge Therapy Through Complete Overdenture Implants To Be On The Far Side Their Money Scope, Mandibular Overdentures Reatined By One Implant Are Reported To Be More Leisurely And Function Better Than Conventional Complete Dentures. The Goal Of The Current Study Were To Analyze The Clinical Outcomes In Comparison Between Two Types Of Attachments, The Locator Attachment Versus The Equator Attachment Used With Immediately Loaded Single Implant Retained Mandibular Overdenture Opposing Conventional Complete Denture. METHODS: Ten Completely Edentulous Patients Were Managed With A Single Implant Inserted Into The Midline Of The Mandible, Followed By Rehabilitation With Complete Dentures And Divided Into Two Equal Groups: Group I Patients Receive Locator Attachment, While Group II Receive Equator Attachment. Immediately After Implant Placement The Implant Stability Quotient (ISQ) Reading Of A Minimum Of 60 Was Measured Before Considering Connection Of The Attachment. Then The Denture Was Relieved In The Midline Providing Adequate Space For Female Housing Of The Attachment And Then The Denture Was Picked Up Directly In The Mouth. The Clinical Outcome Evaluated Two Weeks, Three Months And Six Months After Implant Insertion. RESULTS: The Peri-implant Soft Tissues Assessment Results Showed No Statistically Significant Difference Within Each Group And Between Two Groups At Different Evaluation Period, But The Result Of The Probe Depth In The Present Study Showed Statistically Significant Increase Within The Pair Groups, But There Is No Significant Variation Between The Pair Groups. CONCLUSION: Immediately Loaded Single Midline Implant Retained Mandibular Overdenture Treatment With Locator Attachment Could Be An Alternative And Cost Effective Treatment Option And Relatively Simply Treatment.

Shaza M. Hammad, Noha A. El-Wassefy, Marwa Sameh And Ahmed Fathy,

ABSTRACT


Introduction: Friction In Orthodontics Should Be Controlled During All Stages Of Orthodontic Treatment. As High Friction Cause Prolonged Treatment, To Overcome Such Problem ,we Have To Increase Applied Force During Treatment That May Lead To Root Resorption And Loss Of Anchorage. Although Niti Wires Have Unique Properties Compared With Other Types Of Other Orthodontic Wires, They Have Disadvantages Of Surface Roughness And High Frictional Coefficient.
Objectives: To Investigate The Antibacterial Effect Of ZnO Nanocoating On Mechanical Properties Of NiTi Orthodontic Wires And Antibacterial Activity Of ZnO Coated Wires Against Microorganisms.

Omar Mohamed Ismail, Nouran Abdel Nabi And Iman AbdelWahab,

ABSTRACT
In The Present In-vitro Study, A Total Of 20 Denture Bases Were Fabricated On A Single Model Using Two Different Impression Techniques (ten With Each Technique). In The First Group, Impressions Were Recorded Using A Single Step Impression Technique Employing Preliminary Impressions Using Alginate With Stock Metal Trays Followed By Special Tray Fabrication And Secondary Impression Making Using Condensation Silicone Impression Material. In The Second Group, A Single Step Impression Technique Was Carried Out Using Thermoplastic Impression Trays Carrying Condensation Silicone Impression Material. The Final Denture Bases Were Then Compared In Terms Of Adaptation On The Model Cast Using A Stereo Microscope. The First Group Of Dentures Showed Better Adaptation Than The Second Group.

Yasser M. Aly, Yousreya Shalaby Rania A Fahmy And Dwalat Mostafa,

ABSTRACT
Objective: Purpose Of This Study Was To Evaluate The Effect Of Airabrasion And Combined Air Abrasion & Ultraviolet Treatment On The Surface Topograghy And Wettability Of Zirconia Ceramic Materials.

Materials and Methods: Twenty One Zirconia Discs Were Fabricated From Copran Ceramic Zirconia, Then Were Grouped Into 3 Groups, Seven Specimens Each: (a) Air Abrasion (150um), (b) Air Abrasion & Ultra Violet Radiation, (c) Untreated Zirconia Discs. Surface Topography Was The Assessed By Scanning Electron Microscopy (SEM) And Atomic Force Microscopy (AFM). Wetting Ability Was Assessed By Contact Angle Measurement Test.

Results: Nano Topographic Surface Roughness Was Created In The Treated Groups With Significant Difference With The Untreated Group. Both Surface Treatments Enhanced The Wettability Of The Zirconia Discs

Conclusions: It Was Concluded That Both Air Abrasion And Combined Air Abrasion& Ultraviolet Treatments, Enhanced The Surface Topography Of Copran Zirconia Material By Producing Pronounced Nanoroughness .

Doaa Abdel Fattah Abdel Hamid , Kadry Mohammed Nasr And Khaled Amr,

ABSTRACT
Objective: To Evaluate The Clinical And Radiographic Outcomes Of This Customized CAD/CAM Plate For Mandibular Body Fracture Reduction And Fixation.

Materials and Methods: Ten Patients With At Least A Unilateral Body Fracture Indicated For Open Reduction Internal Fixation .Preoperative Assessment And Preparation Was Done Through A Personal Data, Medical And Surgical History And Family History . After Detailed Clinical And Radiographic Evaluation Every Patient Underwent Routine Preoperative Laboratory Tests. Postoperatively Each Patient Was Followed Up At (two Days, Ten Days, Three Weeks, One And Half Month And Three Months From Day Of Surgery) For The Clinical Signs Relating To Stability Of The Osteosynthesis, Wound Healing, Infection, Occlusion.

Results: Clinical Results Showed That None Of The Cases Showed Clinical Manifestation Of Infection Form The Mandibular Body Segment Or From The Plate Postoperatively, Stable Fractured Segments Postoperatively, And The Corrected Occlusion Was Maintained In All Cases. Radiographic Results Showed Proper Reduction Of The Fractured Segment With Narrowing Of The Inter Fragmentary Gap. Conclusion: Custom Made Plates Fit On Every Person Specific Anatomy Giving Us Better Reduction With Excellent Results And Reduce The Time Of Bending And Fixing The Plate During Operation, Allow Patient To Return To Normal Function Rapidly Immediately After The Surgery (considering Good Nutrition And Verbal Communication), Allow The Prompt Recovery Of The Occlusion. Satisfy The Stress Condition And Produce High Stability, And The Use Of Computer Guided Technology Provided A Significant Improvement In The Field Of Osteosynthesis.

Noha Essam Thabet , Kadry Nasr Geisa And Khaled Amr,

ABSTRACT

Objectives: Evaluation Of The Esthetics Satisfaction Of The Patient And Accuracy By Using Computer Assisted Custom Made Plates In Advancement Genioplasty. Patients And Methods: A Total Of Ten Patients Were Selected From The Out-patient Clinic At The Oral And Maxillofacial Surgery Department And Orthodontic Departments, Faculty Of Oral And Dental Medicine At Cairo University. Patients Were Indicated For Advancement Genioplasty Using Custom Made Plate And Its Bony Based Surgical Guide. The Surgery Was Performed On Adult Patient Age Range From 20 Till 30 Years Old Including 6 Females And 4 Males. Postoperatively Each Patient Was Followed Up 72 Hours, Ten Days, Three Weeks, One Half Month And Three Months Form Day Of Surgery And Then Monthly For 6 Months.

Results: All Patients With Advancement Genioplasty Recovered Totally From A Neurosensory Deficit. The Level Of Satisfaction Was Significantly High For All The Patients. The Results Were Judged To Be Excellent In 73.2% And Good In 26.8% Of The Cases. All Patients Were Satisfied With Their Appearance, Improved Motor Function, And Enhanced Quality Of Life. Conclusion: Computer Assisted Custom Made Plates With Its Bone Based Surgical Guide Designed On Mimics Software Aid In Producing Accurate Measurements Of Osteotomy Position And The Amount Of Chin Advancement. The Surgical Bony Guide And Custom Made Plate Help In Eliminating The Human Error And Save Time By Accurately Determining The Best Osteotomy Position According To The Previous Planed Measurements, As Well It Improves Patients Esthetics Satisfaction

Gomaa L.M, El Baz G.A , Abd Al Khalek W.M And Abo El Soud A. A .,

ABSTRACT


Aim: The Aim Of This Study Was To Evaluate And Compare The Effect Of Three Different Remineralizing Agents (GC Toothmousse, SHY-NM & Biorepair) On Shear Bond Strength Of Vitremer Resin Modified Glass Ionomer Cement To Dentine And To Determine The Mode Of Failure. Materials And Method: In This Study, 20 Sound Freshly Extracted Premolars Were Used. They Were Divided Into Four Groups, Five Each, Group I (control Group), Five Teeth (Mesial And Distal Surfaces) Were Restored With Resin Modified Glass Ionomer (Vitremer) Without Using Any Remineralizing Agents. In Group II: Teeth Were Treated With GC Tooth Mousse Then Restored With Vitremer. Group III: Teeth (ten Surfaces) Were Treated With SHY-NM Then Restored With Vitremer. Group IV: Teeth Were Treated BioRepair Plus Then Restored With Vitremer. Instron Universal Testing Machine Was Used To Assess The Shear Bond Strength. Light Microscopy (x20 Magnification) Was Used To Determine The Modes Of Failure.

Results: The Highest Shear Bond Strength Was In Group III After The Application Of Novamine Containing Paste ?Shy-NM?. While The Lowest Shear Bond Strength Was Found In The Group I (Control Group). For Groups II And IV, The Application Of Both GC Tooth Mousse And Biorepaire Increased The Shear Bond Strength Of Glass Ionomer After Their Application With No Significant Differences Between Them. The Most Frequent Failure Mode Was Adhesive (at Interface). Adhesive Failure Was Found In 27 Samples While The Remaining 13 Samples Were Mixed. Conclusion: The Shear Bond Strength Of Vitremer Resin Modified Glass Ionomer To Dentine Was Improved When Dentine Was Pre-treated With 5 % Novamin Containing Toothpaste, CPP-ACP Containing Paste, Toothpaste Made Of Hydroxyapatite Nanocrystals.

Hadier Mahmoud, Mona Ismail Riad And Mai Mamdouh .,

ABSTRACT


Aim: To Assess The Nanoleakage Of Ormocer-based Composite Resin Using Ormocer-based Etch And Rinse Adhesive Versus Conventional One. Environmental Scanning Electron Microscope (ESEM) And Image Analysis By Software Were Used To Evaluate The Tooth Restoration Interface.

Materials and Methods: A Total 66 Premolars Were Divided Into Two Main Groups According To Type Of Adhesive System Used Either Ormocer-based Adhesive System Or Conventional One, Each Group Was Further Divided Into Three Subgroups According To Storage Time Either 24 Hours, One Month Or Three Months.1mm Thick Beams Were Prepared And Immersed In The Tracer Solution. The Resin-dentin Interfaces Were Analyzed By An Environmental Scanning Electron Microscope (ESEM).

Results: A Non-significant Difference In The Nanoleakage Between Ormocer-based Adhesive And Conventional One For The 24 Hours And Three Months Storage Time. However, Significant Difference Between Ormocer-based Adhesive And Conventional One For One Month Storage Time Where Ormocer-based Adhesive Showed Less Nanoleakage. Conclusion: Tested Adhesives Showed Good Sealing Ability After Aging For Three Months; However, Ormocer Containing Adhesive Performed Better Than That None Containing Over Time With Less Linear Gaps And Silver Impregnation.

Zeiad H. Seif-Alnasr , Yousreya A. Shalaby And Naguib El-Fawal,

ABSTRACT
Background: There Has Been Increasing Interest In The Use Of Porcelain Laminate Veneers As Esthetic Restorations Because These Combine High Aesthetic Appeal, Patient Satisfaction, And Less Invasive Tooth Preparation. However, It Should Be Noted That Minimal Tooth Preparation Means That The Thickness Of The Veneers Is Reduced, Which Leads To Increase In Translucency Leading To An Aesthetic Problem Unless The Factors Related To The Cementing Technique Are Precisely Controlled. Objective: The Aim Of This Study Was To Evaluate The Effect Of Substrate Color, Veneer Thickness And Shade Of Resin Cement On Final Shade Of Ceramic Veneers Using Digital Image Shade Matching Software.

Materials and Methods: A Metal Mold (8?8?4) Mm Was Constructed And Filled With Composite Resin Material. 60 Specimens Were Prepared 30 Specimens A2 Shade And 30 Specimens A3.5 Shade Simulating Teeth Shades. Serial Thin Slices Ceramic Specimens Were Obtained From Multilayered Glass-ceramic Blocks (IPS Empress CAD Multi C14 A1) Using A Low-speed Precision Cutter Under Water Cooling: 30 Ceramic Specimens Of (8?8?0.55 Mm); And 30 Ceramic Specimens Of (8?8?0.8 Mm). One Surface Of Each Ceramic Specimen Was Etched Using 5% Hydrofluoric Acid IPS Ceramic Etching Gel For 20 Seconds, Rinsing And Air Drying + Application Of Silane Monobond-S For 60 Seconds, And Air Drying. Opaque, White And Transparent Resin Cement Multilink? Were Used For Cementation Under Static Load 2.5kg. Shade Analysis Was Done Using Shade Wave Software And Adobe Photoshop C6 Before And After Luting Of The Veneers With Resin Cement.

Results: The Substrate Influenced The Final Color Of The Veneers Without Significant Difference Between Substrate A2 And A3.5. Increasing The Thickness From 0.5mm To 0.8mm Significantly Reduced The Value Of Delta E. Opaque Cement Resulted In Higher Delta E Than White And Transparent Cement With Significant Difference Between The Three Cements Only While Using 0.5mm Veneer Thickness.

Conclusions: It Was Concluded That Substrate, Ceramic Thickness And Shade Of Resin Cement Together Play A Detrimental Role In Changing The Final Color Of Laminate Veneers And Should Be Considered Carefully To Obtain Optimum Results.

Samar A. Mosaad, Suzan A.W. Amin And Heba A. Alasfory,

ABSTRACT
Objective: This Randomized, Clinical Trial Compared The Postoperative Pain After The Use Of Manual And Rotary Instrumentation Of The Same Instrument Design, Namely ProTaper Universal System (Dentsply Maillefer,Tulsa Dental, TN, USA) In Mandibular Posterior Teeth After Single-visit Root Canal Treatment. Participants And Methods: Forty-six Participants With Mandibular Posterior Teeth Without Periapical Pathosis Were Included. The Patients Were Equally Allocated At Random Into Two Groups According To Instrumentation Technique Using Either Manual ProTaper Instruments (Group M) Or Rotary ProTaper Instruments (Group R). Root Canal Treatment For All Participants Was Done In A Single-visit. Pain Intensity Was Assessed Using The Numerical Rating Scale (NRS) 6 Hours, 12 Hours, 24 Hours, 48 Hours, 72 Hours And 7 Days Postoperatively. Pain Incidence At Four Categories (None, Mild, Moderate Or Severe) Was, Also, Recorded. Data Were Statistically Analyzed And P-values< 0.05 Were Considered Statistically Significant.

Results: There Were Significantly More Patients Experiencing No Pain In Group R Than Group M At 12 And 24 Hours (p< 0.05). No Significant Difference In The Distribution Of Patients At The Different Pain Categories Was Detected For The Other Time Points (p>0.005). Patients In Group R Showed Significantly Less Pain Levels Than Those In Group M At 6, 12 And 24h Postoperatively (p< 0.05). Conclusion: Rotary Instrumentation Can Elicit Less Postoperative Pain Than Manual Instrumentation In Patients With Mandibular Posterior Teeth Endodontically Treated In A One Visit.